EP 0013379 B1 19840229 - DIELECTRIC MATERIAL, CIRCUIT BOARDS MADE FROM THIS MATERIAL, AND METHOD OF MAKING SAID MATERIAL AND SAID CIRCUIT BOARDS
Title (en)
DIELECTRIC MATERIAL, CIRCUIT BOARDS MADE FROM THIS MATERIAL, AND METHOD OF MAKING SAID MATERIAL AND SAID CIRCUIT BOARDS
Publication
Application
Priority
- US 97299478 A 19781226
- US 97299578 A 19781226
Abstract (en)
[origin: EP0013379A1] Circuit boards and methods of making circuit boards and dielectric materials for said circuit boards, with relatively high dielectric constants, excellent moisture resistance, and reduced tendency to incur changes in dimensions after processing. The method comprises blending in a polymer dispersion, a particulate filler material having a high dielectric constant and microfibrous material to form a slurry of polymer, filler, and fiber. A flocculant is added to the slurry to agglomerate the polymer particles, the filler particles, and the microfibers to produce a dough-like material. The dough like material is eventually formed into a sheet, and is thereafter dried. A conductive foil such as copper is then applied to both sides of the sheet to provide a circuit board.
IPC 1-7
IPC 8 full level
B29C 67/02 (2006.01); B29C 70/02 (2006.01); B29C 70/88 (2006.01); H01B 3/44 (2006.01); H01B 3/48 (2006.01); H05K 1/03 (2006.01); H05K 1/02 (2006.01); H05K 1/16 (2006.01)
CPC (source: EP)
B29C 67/02 (2013.01); B29C 70/025 (2013.01); B29C 70/88 (2013.01); H01B 3/445 (2013.01); H01B 3/48 (2013.01); H05K 1/034 (2013.01); H05K 1/0366 (2013.01); H05K 1/0373 (2013.01); B29K 2105/0064 (2013.01); B29K 2105/007 (2013.01); B29K 2105/12 (2013.01); B29K 2105/122 (2013.01); B29K 2105/16 (2013.01); B29K 2995/0006 (2013.01); B29L 2007/002 (2013.01); H05K 1/024 (2013.01); H05K 1/162 (2013.01); H05K 2201/0116 (2013.01); H05K 2201/015 (2013.01); H05K 2201/0209 (2013.01); H05K 2201/0251 (2013.01)
Designated contracting state (EPC)
DE FR GB IT SE
DOCDB simple family (publication)
EP 0013379 A1 19800723; EP 0013379 B1 19840229; DE 2966736 D1 19840405
DOCDB simple family (application)
EP 79105203 A 19791217; DE 2966736 T 19791217